Changes for licenses can happen anytime. Unfortunately there is no real good instrument for now available so viewers won’t experience a sudden stop in their watching experience. We volunteers have been pointing this out for years it is on the list for Viki but not yet a priority.
In the last announcement you can see dramas and movies where changes in the license happened. However, I can’t tell if there is another one for Viki Pass Plus issues you would need to look into the Help Center. All information for VPP is not accessible for me since I live in Europe, and we do not have that option at all. Dramas for VPP are normally out of reach for us anyway, but that is not of your concern.
If there is no other topic than the one I linked here, then it’s best you write a request. It could take some time for getting an answer, be patient with the Viki staff.
Hope you will get to know soon.